The Fan,tubeaxial, cataloged under National Stock Number 4140-01-540-2911, is classified within Federal Supply Class 4140 (Fans, Air Circulators, and Blower Equipment) of the Refrigeration, AC, and Air Circulating Equipment group. The manufacturer of record is Kooltronic, Inc.. Government technical data includes 23 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4140-01-540-2911 |
| Primary Part Number | KP500B |
| Item Name | Fan,tubeaxial |
| FSC / FSG | 4140 / 41 — Fans, Air Circulators, and Blower Equipment |
| Manufacturer | Kooltronic, Inc. |
| Status | ACTIVE |
| Mounting Facility Type and Quantity | 4 SLOT |
| Speed Adjustments | SINGLE SPEED |
| Phase | SINGLE |
| Frequency in Hertz | 50.0 AND 60.0 |
| Inclosure Type | FULLY INCLOSED |
| Length | 3.500 INCHES NOMINAL IN |
| Voltage in Volts and Current Type | 115.0 AC |
| Flow Direction | OUTWARD |
| Drive Type | DIRECT |
| Prime Mover Power Rating | 55.0 WATTS |
| Style Designator | FIXED, MULTI-UNIT |
| Ambient Temp at Full Rated Power | -20.0 FAHRENHEIT AND 250.0 FAHRENHEIT DEGF |
| Height | 5.250 INCHES NOMINAL IN |
| Operating Speed at Rated Capacity in RPM | 3100.0 |
| Surface Treatment | ENAMEL BAKED HOUSING |
| Width | 19.000 INCHES NOMINAL IN |
| Material | STEEL OVERALL |
| Prime Mover Type | ELECTRIC MOTOR |
| Rotation Direction for Which Designed | CLOCKWISE |
| Prime Mover Drive Shaft Bearing Type | BALL |
| Electrical Connection Type | CORD W/ATTACHED PLUG |
| Static Pressure at Specified Air Flow Rate | ERR-060 |
| Air Flow Rate | 250.0 CUBIC FEET PER MINUTE NOMINAL |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| KP500B PRIMARY | Kooltronic, Inc. (USA) |
NSN 4140-01-540-2911 is a Fan,tubeaxial, manufactured by Kooltronic, Inc., classified under FSC 4140, Fans, Air Circulators, and Blower Equipment. Status: active.
NSN 4140-01-540-2911 has 1 manufacturer part number on file: KP500B (Kooltronic, Inc.).
1 possible match (shared part number, not a government interchangeability claim): 5110-01-671-7483. Verify interchangeability with system specifications before substitution.
Key specifications for KP500B: Mounting Facility Type and Quantity: 4 SLOT; Speed Adjustments: SINGLE SPEED; Phase: SINGLE; Frequency in Hertz: 50.0 AND 60.0. 23 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.